/**
     * @param $file
     * @return mixed
     */
    public static function excelToArray($file)
    {
        $json['status'] = 'error';
        $fileExtension = pathinfo($file['name']);
        $fileExtension = $fileExtension['extension'];
        if ($fileExtension == 'xls' || $fileExtension == 'xlsx') {
            $data = array();

            $PHPExcelReader = \PHPExcel_IOFactory::createReaderForFile($file['tmp_name']);
            $objPHPExcel = $PHPExcelReader->load($file['tmp_name']);

            $sheetData = $objPHPExcel->getActiveSheet()->toArray(null, true, true, true);
            array_shift($sheetData);
            foreach ($sheetData as $cell) {
                $data[] = $cell['B'];
            }
            $json['status'] = 'success';
            $json['data'] = $data;
        }
        return $json;
    }